Merge #206: fix: typos in documentation files

7f2674f Update README.md (leopardracer)

Pull request description:

  This pull request contains changes to improve clarity, correctness and structure.

  Description correction:
  Corrected `cross compiled` to `cross-compiled`
  Corrected `integration test` to `integration tests`

  Please review the changes and let me know if any additional changes are needed.

ACKs for top commit:
  apoelstra:
    ACK 7f2674f; successfully ran local tests; sgtm
  tcharding:
    ACK 7f2674f

Tree-SHA512: ca57dd9660859d253cd245dd4f7a6faa4109d742786698c0cdec73c8b1edc0de251cc133fe127ee356b42e1e1caf011d3d34787b117801f0b946586dbb6ed26f

embedded/README.md

@@ -1,11 +1,11 @@
 ## Embedded tests
 
 These no-std tests are a bit peculiar.
-They are cross compiled to ARM and run in an emulator.
+They are cross-compiled to ARM and run in an emulator.
 Here's why:
 
  - We want to build for an exotic platform to help make sure `std` doesn't sneak in by accident.
 
  - We use an emulator and build something runnable,
    rather than merely testing whether a library builds,
-   because we want to actually run our integration test.
+   because we want to actually run our integration tests.